/**
 * Copyright (c) 2005-2012 springside.org.cn
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 */
package com.quanshi.scheduler.job.biz.utils;

import java.util.Collection;
import java.util.List;

import org.dozer.DozerBeanMapper;

import com.google.common.collect.Lists;

/**
 * 简单封装Dozer, 实现深度转换Bean<->Bean的Mapper.实现:
 * 
 * 1. 持有Mapper的单例. 
 * 2. 返回值类型转换. 
 * 3. 批量转换Collection中的所有对象. 
 * 4. 区分创建新的B对象与将对象A值复制到已存在的B对象两种函数.
 * 
 * @author calvin
 */
public class BeanMapper
{

    /**
     * 持有Dozer单例, 避免重复创建DozerMapper消耗资源.
     */
    private static DozerBeanMapper dozer = new DozerBeanMapper();

    /**
     * 基于Dozer转换对象的类型.
     */
    public static <T> T map( Object source, Class<T> destinationClass )
    {
        return dozer.map( source, destinationClass );
    }

    /**
     * 基于Dozer转换Collection中对象的类型.
     */
    public static <T> List<T> mapList( Collection<?> sourceList, Class<T> destinationClass )
    {
        List<T> destinationList = Lists.newArrayList();
        for ( Object sourceObject : sourceList )
        {
            T destinationObject = dozer.map( sourceObject, destinationClass );
            destinationList.add( destinationObject );
        }
        return destinationList;
    }

    /**
     * 基于Dozer将对象A的值拷贝到对象B中.
     */
    public static void copy( Object source, Object destinationObject )
    {
        dozer.map( source, destinationObject );
    }
}